Piston-valve or similar structure.



No. 738,237. PATENTED SEPT. 8, 1903 U. REEVES. 'PISTON VALVE 0R SIMILARSTRUCTURE.

APPLIOATIOH FILED JUNE 17. 1902.

NO MODEL.

.Ezventax Mtneasem- CZ 1 60 R z n @6065, d y 1713 Attorney? no. vsaesv.

UNITED STATES Tatented September 8, 1903 PATENT OFFICE.

CLIFTON REEVES, OF TRENTON, NEYV JERSEY.

SPECIFICATION forming part of Letters Patent No. 738,237, dated.September 8, 1903 Application filed June 1'7 1902. Serial No. 112,045.(No model.)

To all whom it may concern:

Be it known that I, CLIFTON REEvEs, a citizen of the United States,residingin Trenton, in the county of Mercer and State of New Jersey,have invented certain new and useful Improvements in Piston-Valves orSimilar Structures, of which the following is a specification.

This invention relates to valves; and it consists,substantially, in theimprovements hereinafter particularly described.

Though applicable to other similar structures, my improvements havereference more especially to piston-valves for steam and other fluidengines; and one of the principal objects of the invention is to providea structure of this kind which is elfective and reliable under allconditions of use and one which is simple in construction, besides beinglight in Weight and comparatively inexpensive to manufacture.

A further object is to provide a structure of the character referred topossessing a comparatively limited number of parts or elements and onein which the liability to breakage or loosening of said parts orelements is greatly reduced or lessened.

A further object of the invention is to provide means for effectuallycompensating for or taking up any wear occurring between the operativeor working faces of the valve structu re and the seats therefor in thesteam-chest or cylinder, and also to provide means whereby the valvestructure may be easily and quickly fitted within the steam-chest orcylinder and readily connected up for use.

A still further object is to provide means whereby the adjustments andfastening of the operative or working face at each head of the valve maybe effected separately from orindependently of the other, and alsowhereby such adjustments may be performed at one and the same valve-headand while the structure is in working position.

The above and additional objects are attained by means substantiallysuch as are illustrated in the accompanying drawings, in which Figure lis a side view of my improved piston-valve or analogous structure, saidview being in part elevation and in part longitudinal section andshowing very clearly the construction of the valve-heads, together withthe devices or means for effecting adjustments of the packing-ringswhich constitute the working faces of the valve, said rings beingcooperatively organized with said heads and said adjusting devices. Fig.2 is a view of my improved piston-valve or analogous structure partlybroken away and looking at the same from the end thereof at the left ofFig. 1. Fig. 3 is an end view looking at the structure from the endthereof at the right of Fig. 1. Figs. 4 and 5 are respectively atop planand aside viewof a portion of one of the packing-ringsto show the meansemployed for preventing leakage of the valve structure and also wherebysteam or other motor fluid is prevented from access to the inner side ofthe packing-rings or the interior of the valve. Fig. 6 is a viewinperspective indicating more clearly the construction and organization ofthe elements referred to in Figs. 4 and 5.

Before proceeding with a more detailed de= scription it may be statedthat While I have herein shown my improvements applied to a piston-valvefor steam and other fluid engines the same are equally applicable tomany forms of pump and other pistons or plungers, and hence my inventionis to be understood as comprehending all such and analogous structuresinvolving a body for rotation or reciprocation within a chest orcylinder and having as accompaniments thereof or in combinationtherewith expansible rings or similar devices constituting the workingor guiding faces of the body and moving against or in contact with theinner surface of said chest or cylinder.

My improved piston-valve or similar structure comprises a valve-body,and preferably two heads located at the ends of the body, and combinedwith said body and each of said heads is a packing-ring of specialconstruction and an adjusting or expanding device therefor, also ofspecial construction. Extending lengthwise of the body of the valve is arod or shaft connecting with said adjusting or expanding devices and toone of the valve-heads suitable attachment of one end of the valve-rodis made. The rod or shaft connecting the adjusting or expanding devicescooperates with each of said devices in the adjustment or expansion ofthe pack- IUU ing-rings, and the construction and organization ofthecomponent elementsor mechanisms of my improved piston-valve are suchthat the adjustment or expansion of the packingring at one valve-headmay be performed without in any manner affecting or interfering with thepacking-ring at the other valvehead. The construction and organizationof the adjusting or expanding devices are also such, however, that theadjustment or eX-.

pansion of both packing-rings may be effected simultaneously, ifdesired, with but little change or alteration, as will appearhereinafter. I also employ locking devices of special embodiment forsecuring each of the adjusting or expanding devices in place after thesame has been operated to expand the ring with which it cooperates, andthe parts or elements of the whole structure are so fitted and adaptedone to the other that no looseness or derangement thereof is had duringthe working of the structure. Still further, I employ simple andeffective devices cooperating with the ends of the expansiblepacking-rings, so as to prevent leakage of the valve and also preventingsteam or other motor fluid from passing into the valve, it being hereobserved that the outer surfaces of said expansible packing-ringsconstitute the operative or working faces of the valve or similarstructure, passing as they do back and forth across the ports in thesteam-chest or cylinder (not shown) in a manner Well understood.

Specific reference being had to the accompanying drawings by thedesignating characters thereon, A represents the body of my improvedpiston-valve or analogous structure, at the ends of which are fitted inany suitable manner the valve-heads B and O. The said body A ispreferably tubular and contracted for the greater part of its length, asshown, leaving the end portions a and a thereof somewhat enlarged orflaring and faced off at the edges 1) and b, and extendinglongitudinally of and within the body is a rod or shaft D, which is ofspecial construction, as will be explained, and which cooperates withthe adjusting or expanding devices E and F for the expansiblepacking-rings G G, both the said devices and the said rings being alsospecifically referred to hereinafter.

The valve-head B consists of a circular disk of suitable dimensions,preferably beveled or reduced in thickness at the edge, as indicated atc, and is formed with a central circular opening (I, through whichpasses the inner end portion 6 of the valve or other rod H, said rodbeing formed or provided with a flange or collar f, the inner face ofwhich abuts the outer or adjacent face of the hub portion 9 of saidvalve-head B. The said inner end portion of the valve-rod H isscrewthreaded at h fora suitable distance, and the fastening of said rodto the valve-head B is effected, preferably, by two check or lock n u tsii, the outer face of the formerof which abuts the inner or adjacentface of the said hub portion g, or instead of this means ofattachmentthe said valve-head B may be keyed or otherwise secured to thesaid valve or other similar rod H, as is apparent. The outer surface ofthe expansible packing-ring G between the edges thereof is straight andparallel with the axis or sides of the shaft H, while the inner surfaceof said ring is tapered or convergent from the inner edge to the outeredge thereof, thus giving to the sides of the opening in the ring aconical form, as shown, the smaller inner diameter of the ring beingadjacent the inner surface of the valvehead B. The said valve-head isformed or provided diametrically at or near the edges thereof with flushportions Z, in which are formed smooth-bored openings m for the passageof bolts or pins 71, the inner end portions 01' of which are threaded asuitable distance for screwing into threaded openings therefor inprojections 0 at corresponding positions on the exterior of the enlargedor flared end a of the body A of the valve. The said bolts or pins 11also pass through corresponding smooth-bored openings 8, formed inbearing portions or offsets 20, disposed or located at correspondingpoints at the inner surface of a substantially hollow cone M, whichforms a part of the adjusting or expanding device E at the saidvalve-head B. The outersurface of the cone M fits the inner conicalsurface of the said expansible packing-ring G, the said cone beingconsiderably less in width than the said packing-ring, and the sides oredges of the latter fit closely or snugly between the edge Z) of theenlarged end a of body A and the inner side of the valve-head B, asshown, the body of the packing-ring being also of depth or thicknesssufficient to bring the outer or working face thereof considerablybeyond the plane of the periphery or edge of said valve-head B. The saidadjusting or expanding device E is further constituted of a disk e,having an enlarged central recess 6 and also with an inwardly-extendingspider E having attached thereto or integral therewith a ring 6 theinner surface of which closely fits around the portion d of the rod orshaft D and the edges of which snugly fit between the adjacent or innersurfaces of collars or flanges d and d, formed with or fastened to saidrod or shaft the proper distance apart.

From the construction and organization of elements thus far described itis apparent that if bodily movement be imparted to the rod or shaft D inthe direction of the valvehead B the said adjusting device E will becorrespondingly moved and the ring G thereby expanded, it beingunderstood that said ring is divided or split-as indicated at 2, forinstance. The manner of so operating said rod or shaft D for thispurpose will be hereinafter fully explained, as will also the means forlocking the parts to the positions to which they may be moved.

ICO

The rod or shaft D is formed at the end thereof opposite to that abovereferred to with preferably a squared portion (1 for application theretoof a suitable wrench, and at a suitable distance from this end said rodor shaft is also formed with a screw-threaded section (V, as shown.Fitting upon this end of said rod or shaft is a sleeve N, provided atits outer end with a flange or collar n formed with notches orserrations n at the edge thereof, and which is also formed, preferablyat opposite diametric points, with threaded openings in which are fittedsetscrews 1%, the purpose or function of which will presently appear.Said sleeve N is provided interiorly with a screw-thread 9?, fitting thescrew-threaded section of rod or shaft D, and the sleeve is also formedexternally for a considerable part of its length with a screw-thread 01a relatively small area of the external surface of the sleeve being leftsmooth or plain, as indicated at 11 The valve-head O is located at thisend of the structure, as is understood, and the said head comprises acircular disk or plate 5, having a central opening 6, and settinginwardly from said plate and partially forming the sides of said openingis a flange 7, which integrally unites the said disk or plate 5 with aring-plate 8, the outer side of which latter fits closely against theinner or adjacent side of flange or collar n on sleeve N, and the inneredge or surface of which fits the plain or smooth portion 71 of saidsleeve, as shown. Screwing upon the externally-threaded portion 11 ofthe sleeve N is a nut 10 for confining the ring-plate 8 snugly in placebetween the outer face of said nut and the inner or adjacent face of theflange or collar 12, and also screwing upon said externally-threadedportion n and adjacent the inner face of said nut 10 is a jam-nut 11,secured to sleeve N by means of a pin 12 or other means, so as toprevent both of said nuts from turning relatively to said sleeve. Bytightening up the set-screws n hereinbefore referred to, so as to causethe inner ends thereof to bear against the outer face of saidring-plate, it is apparent that the said sleeve N will be prevented fromturning relatively to or upon the threaded section of the rod or shaftD. As an additional means for preventing said sleeve from so turning Ialso employ a looking device of any desired form and consisting,preferably,in the present instance of an arm 15, located within therecessed outer face of valve-head C (see Fig. 1) and formed with aninner member 16, having a lug 17, which engages in the notches orserrations n in the edge of flange or collar 92?, and the outer end ofsaid arm is formed or provided with a member 18, having an openingthrough which passes a threaded stud 19, which screws into a threadedopening or recess therefor provided in the outer face of the disk orplate 5 of valve-head O, as shown. Screwing upon the outer end of saidstud is a nut 20, which is prevented from turning preferably by means ofa split pin 21, passing through an opening therefor in the stud.

The numeral 25 designates a circular plate or washer having a squaredcentral opening 26 to fit upon the squared portion d of rod or shaft D,and this plate or washer is clamped against the adjacent portions of theouter surface of flange or collar n of sleeve N by means of screws 27,passing through preferably diametrically opposite openings therefor insaid flange or collar, the headsof said screws overlapping said plate orwasher at the edges, as clearly shown in Fig. 3. In this instance also Ipreferably employ an additional locking device, consisting of a plate28, secured to the outer face of flange or collar n by means of a stud29 and nut 30, said plate having a lug 31 taking into or engagingnotches or serrations 31, formed in said plate or washer 25, preferablyall around at the edge, so as to enable any desired adjustment of shaftD to be made in the manner appearing hereinafter.

As regards each of the special or additional locking devices hereinreferred to, it will be understood that I am not limited thereto intheir precise details, since departures therefrom may be made and stillcome Within the scope of my invention. It will also be understood thatthe notches n in flange or collar n may also be formed all around theedge of the latter, if desired.

The circular disk or plate 5 of valve-head O is reduced in thickness orbeveled at the edge, as shown at 5, and said disk or plate is provided,preferably at opposite diametric points, with flush portions 56, formedwith smooth-bored openings, through which pass studs or bolts 35,threadeda suitable distance from their inner ends at 36 to enterthreaded openings therefor in projecting portions 37 at correspondingpositions on the outer surface of the enlarged or flaring end a, of thebody A of the structure, the studs or bolts being also threaded at 38for a suitable distance from the outer ends thereof to receive thefastening-nuts 39, which are secured in place by means of split pins 40,forinstance, passing through suitable transverse openings in the saidstuds or bolts. The studs or bolts 35 also pass through correspondingsmoothbored openings formed in a disk 41, having formed therewith a cone45, which cooperates with the expansible ring G, the inner surface 46 ofwhich is tapered or conical in correspondence with the outersurface ofsaid cone, as shown, the outer surface of said ring constituting one ofthe workingfaces of the valve structure, as alreadyexplained, and saiddisk and cone in part constituting the adjusting or expanding device Ffor this expansiblering, which latter is split at 47, as shown in dottedlines in Fig. 3, and confined between face I) of the end ct of the bodyA of the valve and the inner face of the valve-head C. The said disk 41is formed with an. enlarged central opening 48, and connecting with thedisk is an inwardly-extending spider 49, the inner extremity of which isprovided with a ring 50, which is screw-threaded interiorly at 51 to fitand work upon the externally-threaded portion a of the sleeve N.

It is to be understood that as thus constructed and organized theseveral cooperative elements at each end of the valve or similarstructure are tightened in place by screwing up the nuts on the outerends of the studs or bolts which secure the valve-heads to the endportions of the body of the valve, the inner ends of said bolts beingriveted or upset, as shown, to prevent the latter from working loose orpulling out. Now should it be desired, for instance, to move theadjusting device E outwardly, by which to adjust or expand the ring G totake up or compensate for wear occurring at the outer face of said ring,the screws 27 are loosened, so as to disengage the plate or washer 25from the flange or collar 01 of ring N, whereupon the plate 28 isdetached from said flange or collar, thus releasing the lug 31 from thenotch 31 engaged thereby, and then by applying a suitable wrench to thesquared portion (1 of rod or shaft D the latter may be turned, and invirtue of the threaded connection between this rod or shaft and thesleeve N the said rod or shaft will be caused to move longitudinally,and thereby operate upon the expanding device E in an obvious manner andcausing the latter to move, so as to adjust or expand the said ring G.After this the parts are again tightened up,as bef0re,and it will beapparent that in conducting these operations the sleeve N is preventedfrom rotating or moving in either direction lengthwise of the rod orshaft D by reason of the described locked relation existing between thesaid sleeve and the valve-head 0. Hence the adjusting device F for theexpansible packing-ring G remains unaffected. Whenever it is desired tooperate the said adjusting or expanding device F to expand thepacking-ring G, the set-screws n are loosened and the additional lockingdevice or arm 15 is detached by removing stud 19 and disengaging the lug17 from the notched edge of flange or collar n whereupon by turning thesleeve N in the proper direction the said adjusting or expanding devicewill be moved outwardly in virtue of the threaded connection between theinner surface of ring and the external surface of a portion of saidsleeve, as already explained. During these operations the saidpacking-ring G will be expanded in an obvious manner, and the oppositeadjusting or expanding device E will remain unafiected thereby.

In order toprevent leakage of steam or other motor fluid into the valvestructure through the space or split formed between the ends of each ofthe expansible packingrings G and G, and which is undesirable forseveral reasons, I preferably notch each end of each of said rings atthe sides thereof, as

indicated at in Fig. 6, so as to reduce the width of said rings at theends for a suitable distance, as shown, and to each side of one of thereduced ends of each of said rings I attach, by means of rivets 61, astrip 62, the upper edge of which is curved in conformity with thecurved outer surface of the ring, the ends of said strips being alsocurved at 63 to fit against the corresponding curved walls 6i of thenotches 60. In this way a movable connection may be said to be formedbetween the ends of each of the expansible packing rings, and seatedinrecesses 65 therefor in the outer face of each of the cones of theexpanding devices E'and F is a block or plate 66, which is flush withsaid cone-face, said blocks being of width greater than the depth ofsaid cones and each block extending the full distance between the innerface of one of the valve-heads and the adjacent edge of the end portionof the valve-body. By the construction and organization of elementsreferred to no steam or other fluid can possibly pass into the interiorof the valve at whatever distance apart the ends of the packing-ringsmay be separated, and which feature is a very important one in thisclass of inventions.

As before stated, I do not wish to be understood as limiting myself tothe precise details of construction and organization of elements hereinillustrated and referred to. 7

Having described my invention, I claim 1. A piston-valveor similarstructure comprising a body, a packing and an expanding device thereforat each end of the body, and means for effecting the independentadjustment of each of said devices from the same end of the body.

2. A piston-valve or similar structure comprising a body, a splitpacking-ring and an expanding device therefor at each end of the body,and means foreifecting theindependent adjustment of each of said devicesfrom the same end of the body.

3. A piston-valve or similar structure comprisinga body, a packing andan expanding- IIO cone therefor at each end of the body,and

means for efiecting the independent adj nstment of each of said conesfrom the same end of the body.

4. A piston-valve or similar structure comprising a body, a splitpacking-ring and an expanding-cone therefor at each end of the body, andmeans for efiecting the independent adjustment of each of the cones fromthe same end of the body.

5. A piston-valve or similar structure comprising a body, a packing andan expanding device therefor at each end of the body, devices forefiecting the independent adjustment of each of said expanding devicesfrom the same end of the body, and means for locking each of saidadjusting devices in different positions.

6. A piston-valve or similar structure comprising a body, a packing andan expanding device therefor at each end of the body, devices foreffecting the independent adjustment of each of the expanding devicesfrom the same end of the body, and means located at one end of the bodyfor locking each of said adjusting devices in different positions.

7. A piston-valve or similar structure comprising a body, a splitpacking-ring and an expanding-cone therefor at each end of the body,devices for effecting the independent adjustment of each of said conesfrom the same end of the body, and means located at this end of the bodyfor locking each of said adjusting devices in different positions.

8. A piston-valve or similar structure comprising a body, a packing andan expanding device therefor at each end of the body, devices foreffecting the independent adjustment of each of said expanding devices,and means located at the same end of the body for locking each of saidadjusting devices in different positions.

9. A piston-valve or similar structure comprising a body, a splitpacking-ring and an expanding device therefor at each end of the body,and means for effecting the independent adjustment of each of saiddevices from the same end of the body, said packing-ring having amovable steam-tight joint at the split portions thereof.

10. A piston-valve or similar structure comprising a body, a splitpacking-ring and an expanding-cone therefor at each end of the body, andmeans for elfecting the independ ent adjustment of each of said devicesfrom the same end of the body, said packing-ringhavingamovablesteam-tightjointat thesplit portions thereof.

11. Apiston-valveorsimilarstructurecomprising a body, ahead and anexpansible packing-ring at each end of the body, said rings having innerconical surfaces, a device including a cone for expanding each of saidrings, and means located at the same valvehead for locking each of saiddevices in different positions of adjustment.

12. A piston-valve or similar structure comprising a body, a head and asplit packingring at each end of the body, said rings having innerconical surfaces, devices including a cone for expanding each of saidrings, and means located at the same valve-head for locking each of saiddevices in different positions of adjustment.

13. Apiston-valveorsiniilarstructurecomprising a body, a head and asplit packingring at each end of the body, and devices including a conefor expanding each of the rings, said rings being each reduced in widthat the ends and provided with overlapping strips, and said cones beingrecessed and provided with blocks extending between the valve-heads andends of the body beneath said strips.

14. Apiston-valveorsimilarstructure comprising a body enlarged at theends thereof,

a head and a split packing-ring at each of such ends, and devicesincludingacone for expanding each of the rings, said rings being eachreduced in width at the ends and provided with overlapping strips, andsaid cones being recessed and provided with blocks extending'between thevalve-heads and ends of the body beneath said strips.

15. Apiston-valveorsimilarstrncturecomprising a hollow body enlarged orflaring at the ends, a head and a split packing-ring at each of suchends, and means including a cone for expanding each of the rings, saidrings being each reduced in wid that the ends thereof and provided withoverlapping strips, and said cone being recessed and provided withblocks extending between the valveheads and endsofthe body beneath saidstrips.

16. Apiston-valveorsimilarstructurecomprising a hollow body, a head andan expansible packing-ring at each end of the body, an expanding devicefor each ring, and a rotatable rod or shaft connecting said devices andadapted to be moved longitudinally to operate one of them independentlyof the other.

17. A piston-valve or similar structure comprising a hollow body, a headand an expansible ring at each end of the body, a valve or similar rodconnected to one of the heads, an expanding device for each ring, and arotatable rod or shaft connecting the said devices and adapted to bemoved longitudinally to operate one of them independently of the other.

18. Apiston-valveorsimilarstructurecomprising a hollow body, a head andan expansible packing-ring at each end of said body, an expanding devicefor each ring, a rotatable rod connecting said devices and adapted to bemoved longitudinally to operate one of them independently of the other,and means for locking each of said devices in different positions ofadjustment.

19. Apiston-valveorsimilarstructurecomprising a hollow body, a head andan expansible packing-ring at each end of said body, an expanding devicefor each ring, a rotatable rod connecting said devices and adapted to bemoved longitudinally to operate one of them, and means located at one ofthe valveheads for locking each of said devices in different positionsof adjustment.

20. Apiston-valveorsimilarstrncturecomprising a hollow body, a head andan expansible packing-ring at each end of the body, a cone for expandingeach ring, and a rotatable rod connecting said cones and adapted to bemoved longitudinally to operate one of them independently of the other.

21. Apiston-valveorsiinilarstructm'e comprising a hollow body, a headand an expansible packing-ring at each end of the body, a valve orsimilar rod connected to one of the heads, a cone for expanding eachring, and a rotatable rod connecting said cones and adapted to be movedlongitudinally to operate one of them.

22. Apiston-valveorsimilarstructurecomprising a hollow body, a head andan expansible packing-ring at each end of said body, a cone forexpanding each ring, a rotatable rod connecting said cones and adaptedto be moved longitudinally to operate one of them, and means for lockingeach of said cones in difierent positions of adjustment.

23. Apiston-valveorsimilarstructurecomprising a hollow body, a head andan expansible packing-ring at each end of said body, a cone forexpanding each ring, a rotatable rod connecting said cones and adaptedto be moved longitudinally to operate one of them, and means located atthe same valve-head for locking each of said cones in differentpositions of adjustment.

24. Apiston-valveorsimilarstructurecomprising a hollow body, a head andan expansible packing-ring at each end of the body, a cone for expandingeach ring, one of said cones being provided with a spider having a ring,and a rotatable longitudinally-movable rod connecting said cones, oneend of said rod working in the ring and provided with collars at theopposite edges of said ring.

25. Apiston-valveorsimilarstructurecomprising a hollow body, a head andan expansible packing-ring at each end of the body, a valve or similarrod connected to one of the heads, a cone for expanding each ring, oneof said cones being provided with a spider having a ring, and arotatable longitudinallymovable rod connecting said cones, one end ofsaid rod working in the ring and provided with collars at the oppositeedges of said ring.

26. Apiston-valveorsimilarstrncturecomprising a hollow body, a head andan expansible packing-ring at each end of the body, a cone for expandingeach ring, one of said cones being provided with a spider having a ring,and a rotatable longitudinally-movable rod connecting said cones, oneend of said rod working in the ring and provided with collars at theopposite edges of said ring, and means for locking each of said cones indifferent positions of adjustment.

27. Apiston-valveorsimilarstructurecomprising a hollow body, a head andan expansible packing-ring at each end of the body, a cone for expandingeach ring, one of said cones being provided with a spider having a ring,and a rotatable longitudinally-movable rod connecting said cones, oneend of said rod working in the ring and provided with collars at theopposite edges of said ring, and means located at the same valve-headfor locking each of said cones in different positions of adjustment. I

28. Apiston-valveorsimilarstructure comprising a body, and a head and anexpansible packing-ring at each end of the body, a rotatable rod withinthe body having collars at one end thereof and provided with a threadedsection at the other end, an expanding device for one packing-ringformed with a part fitting between said collars, a sleeve internallythreaded to turn on said threaded section of the rod, said sleeve beingalso threaded externally, an expanding device for the other packing-ringhaving a threaded part working on said sleeve, and means for lockingeach of said expanding devices in different positions ofadjustment.

29. A pistonvalve or similar structure comprising a body, and a head andan expansible packing-ring at each end of the body, a rotatable rodwithin the body having collars at one end thereof and provided with athreaded section at the other end, an expanding-cone for onepacking-ring having a ring fitting between said collars, a sleeveinternally threaded to turn on said threaded section of the rod, saidsleeve being also threaded externally, an expanding-cone for the otherpacking-ring having a threaded ring Working on said sleeve, and meansfor locking each of said expanding-cones in different positions ofadjustment.

30. Apiston-valveorsimilarstructurecomprising a body, and ahead and anexpansible packing-ring at each end of the body, one of said headshaving a valve or similar rod connected thereto, a rotatable rod withinthe body having collars at one end thereof and provided with a threadedsection at the other end, an expanding device for one packingring havinga ring fitting between said collars, a sleeve internally threaded toturn on said threaded section of the rod, said sleeve being alsothreaded externally, an expanding device for the other packing-ringhaving a threaded ring working on said sleeve, and means for lockingeach of said expanding devices in different positions of adjustment.

31. Apiston-valveorsimilarstructnrecomprising a hollow body enlarged atthe ends, and a head and an expansible packing-ring at each of suchends, a rotatable rod within the body having collars at one end thereofand provided with a threaded section at the other end, an expandingdevice for one packing-ring having a ring portion fitting between saidcollars, a sleeve internally threaded to turn on said threaded sectionof the rod, said sleeve being also threaded externally, an expandingdevice for the other packing-ring havinga threaded ring workingon saidsleeve, and means for locking each of said expanding devices indifferent positions of adjustment.

32. Apiston-valve orsimilarstructure comprising a hollow body enlargedor flaring at the ends, and a head and an expansible packing-ring ateach of such ends, a rotatable rod within the body having collars at oneend thereof and provided with a threaded section at the other end,-anexpanding-cone for one packing-ring formed with a ring portion fittingbetween said collars, a sleeve internally threaded to turn on saidthreaded section of the rod, said sleeve being also threaded externally,an expanding-cone for the other packing-ring having a threaded ringworking on said sleeve, and means for locking each of saidexpanding-cones in different positions of adjustment.

A piston-valve or similar structu rc comprising a body, and a head andan expansible packing-ring at each end of the body, a rotatable rodwithin the body formed at one end.

with a threaded section and squared to receive a wrench, an expandingdevice for one packing-ringhaving movable connection with the other endof the rod, a threaded sleeve working on said threaded section of therod, said sleeve being also threaded externally a distance from itsinner end, and provided at its outer end with a flange or collar lyingagainst the outer face of the valve-head at that end, said flange orcollar being formed with openings having set-screws, and also havingnotches at the edge thereof, lock'nuts on the sleeve at the innerface ofsaid valve-head, a plate or washer having notches at the edge andfitting the squared portion of the rod against the outer face of saidflange or collar, screws entering openings in the latter and havingheads overlapping the edges of said plate or washer, an expanding devicefor the other packing-ring having a threaded ring working on saidsleeve, and a locking device for each of said expanding devices havingmeans engaging the notches of said flange or collar and said washerrespectively.

34. A piston-valve having at each end a packing, and also having at oneend means for effecting separate adjustment of either packing at will;in combination with a valve-operating rod projecting from the other endof the Valve.

35. A piston-valve having at each end a packing, means at one end of thevalve for adjusting at will the packing at said end, and means,including an independently-movable part extending through said adjustingmeans, for adjusting at will the packing at the other end of said valve.

36. In a piston-valve, the combination with a plurality of packings, oneat each end of the valve, and means for confining the edges of saidpackings, of an adjusting member for one of said packings, including anadjustable part which extends beyond the other packing.

87. In a piston, the combination with a plurality of packings, one ateach end of the piston, of two independently-revoluble members onewithin the other, means controlled by one of said revoluble members forexpanding one of said packings, and means controlled by the other ofsaid revoluble members for expanding the other of said packings.

38. In a piston, the combination with a plurality of packings, one ateach end of the piston, of two independently-revoluble members onewithin the other, means controlled by one of said revoluble members forexpanding one of said packings, means controlled by the other of saidrevoluble membersfor expanding the other of said packings, and means forsecuring at will said revoluble members so that they may revolvetogether.

39. In a piston, the combination with a plurality of packings, one ateach end of the piston, of two independently-rem]uble members one withinthe other, means controlled by one of said revoluble members forexpanding one of said packings, means controlled by the other of saidrevoluble members for expanding the other of said packings, means forsecuring at will said revoluble members so that they may revolvetogether, means for securing at will'one of said revoluble members sothat they may revolve together, and means for securing at will one ofsaid revoluble members to a fixed part of the piston, so as to preventits movement while the other of said revoluble members is beingadjusted.

40. In a piston, the combination with packings at the ends of thepiston, of a revoluble member, means controlled thereby for expandingone of said packings, a second revoluble member having a threadedengagement within the first revoluble member, and means controlled bysaid second revoluble member for expanding the other of said packings.

41. In a piston, the combination with packings at the ends of thepiston, of a head at one end of the piston, a revoluble member mountedin said head, a member having a threaded connection with said revolublemember and also having means for expanding one of said packings, asecond revoluble member within the first revoluble member and having athreaded engagement therewith, and means controlled by said secondrevoluble member for expanding another of said packings.

4-2. In a piston, the combination with a plurality of packings, ofadjustable means independently connected to each of said packings forexpanding either of said packings at will independently of the remainingpacking or packings.

43. In a piston-valve, the combination witlf packings at the ends of thevalve, of independently-operable members movable longitudinally of thevalve and provided with means for adjusting said packings, a central rodhaving a pivotal engagement with one of said longitudinally movablemembers, a sleeve threaded upon said rod, means for coupling said sleeveto a fixed part of the valve at will so that the rod may when rotatedmove longitudinally within the sleeve, a threaded portion upon saidsleeve which engages a threaded portion upon the other of saidlongitudinally-moving members, and means for coupling together at willsaid sleeve and said central rod, so as to prevent relative endwisemovement between them during the adjustment of the last-mentionedlongitudinallymovable member.

44. In a piston, the combination with packingrings, of cones within saidrings, and means for effecting movement longitudinally of the piston ofeither of the cones at will independently of the other thereof.

45. In a piston-valve, the combination with packing-rings, of coneswithin said rings, and means effecting movement longitudinally of thevalve of either of the cones at will independently of the other thereof,said moving means including parts extending to the same end of thevalve.

46. In a piston-valve, the combination with a body, of packings at theends of said body, heads between which and the body the packings areclamped, cones within the packings, and devices for adjusting eithercone at will independently of the other.

47. In a piston-valve, the combination with a body, of packings at theends of said body, heads between which and the body the packings areclamped, cones within the packings, devices for adjusting either cone atwill independently of the other, and a valve-operating rod projectingfrom one of said heads, one of said adjusting devices extending throughthe body to the other of said heads.

48. In a piston-valve, the combination with a body, of packings at theends of said body, heads between which and the body the packings areclamped, cones within the packings, a screw-threaded device foradjusting one of said cones, means for clamping said screwthroadeddevice, an independently-operable threaded device for adjusting theother of said cones, and means for clamping the lastmentionedscrew-threaded device.

49. In a piston-valve, the combination with a body, of packings at theends of said body, heads between which and the body the packings.areclamped, cones Within the packings, a screw-threaded device foradjusting one of said cones, means for clamping said screwthreadeddevice, an independently-operable threaded device for adjusting theother of said cones, and means for clamping the lastmentionedscrew-threaded device; one of'said screw-threaded devices extending tothe end of the piston at which the other of said screwthreaded devicesis mounted, and having at said end a part adapted for operation by asuitable tool.

CLIFTON REEVES.

Witnesses:

LIN'roN SATTERTHNVAIT, EDWARD 0. Lone.

